Pendulum-locking device for weighing scales



Jan. 13, 1925. 1,522,623

C. H. HAPGOOD PENDULUM LOCKING DEVICE FOR WEIGHING SCALES Mmmm immmmm ation/w11 Patented Jan. 13, 1925.

UNITED STATES PATENT OFFICE.

CLARENCE H. HAPGOOD, O-F TOLEDO', OHIO, ASSIGNOR TO TOLEDO SCALE COMPANY, OF TOLEDO, OHIO, A CORPORATION F NEW JERSEY.

PENDULTJ'M-LOCKING DEVICE FOR V/'EIGHING- SCALES.

Application filed December 29, 1922.

To all whom t may conce/m: Y

Be it known that I, CLARENCE II. HAP- ooon, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Pendulum-Locking Devices for IVeighing Scales, of which the following is a specification.

This invention relates to Weighing scales of the type in which the load on the scale is counterbalanced by pendulums, and one of its principal objects is to provide means for locking such pendulums against movement so that the scale may be shipped wit-hout injury.

Other objects and advantages will be apparent from the following description, in which reference is had to the accompanying drawings illustrating a preferred embodiment of my invention and wherein similar reference numerals designate similar parts throughout the several views.

In the drawings Figure I is a front elevation of a scale f embodying my invention;

Figure II is an enlarged fragmentary elevational view showing the application of my looking device to scale weighing mechanism; and

Figure III is a further enlarged fragmentary perspective view showing some of the elements of my locking device.

I have shown the device-as applied to a counter scale of the type illustrated and fully described in my co-pending application Ser. No. 433,922, filed December 29, i920, in which loads are counterbalanced by a pair of oppositely swinging pendulums l suspended by means of flexible metallic ribbons 2 which normally lie against the vertical faces of a sector guide 3. The parts 4 of the pendulums to which the ribbons 2 are connected are arcuate in' shape and are usually called fulcrum sectors, because, as the pendulums swing outwardly in counterbalancing a load, the fulcrum sectors roll upwardly on the ribbons 2 which lie against the vertical faces of the sector guide 3. Formed upon the pendulums in line with 'the centers of curvature of the fulcrum sectors 4 are projecting lugs 5 which move vertically upwardly as the pendulums 1 swing outwardly, and secured to the frame of the scale and lying adjacent to but normally out of contact with the lugs 5 are vertically Serial No. 609,584.

extending guard bars 6. These guard bars prevent the fulcrum sectors 4 from swinging away from the sector guides 3 to any considerable distance by engaging the lugs 5 so that the scale can be moved about the place in whichA it is used without liability to such derangement as might result if the pendulums were free to iiop about. l/Vhen the scale is to be shipped, however, it is necessary that the pendulums be firmly and reliably held against any movement whatever.

`When it is desired to absolutely lock the pendulums, a crossbar 7 having notches 8 adjacent its ends is secured to the guard bars (i with the notches' 8 in engagement with the lugs 5. The guard bars 6 are provided with vertical slots 9 adapted to receive screws 10 which are threaded into holes in the ends of the crossbar 7. Since the screw l() may be moved upwardly and downwardly in the slot 9, the crossbar may be pushed down until the walls of the notch 8 are firmly engaged with the lugs 5 and the ribbons 2 are taut before the screws 10 are turned up to clamp the crossbar in place. Slidably mounted on the crossbar 7 is a clip 11 having an inclined edge l2 adapted, when the clip is slid toward the 4end of the bar, to engage the lower side of the lug 5 and thus retain the lug firmly seated in the notch S. The clip ll may be clamped in place by the screw 14 passing through a slot 13 in the clip. With the crossbar in the position shown in Figure II the pendulum is iirmly held against movement.

lVhile it will be apparent that the illustrated embodiment of my invention herein disclosed is well calculated to adequately fulfill the objects primarily stated, it is to be understood that the invention is susceptible to variation, modification and change within the spirit and scope of the subjoined claims.

Having described my invention, I claim:

l. In a device of the class described, in combination, a pendulum, a projection on said pendulum, a guard member adapted to co-operate with said projection for preventing excessive displacei'uent of said pendulum, a locking member engageable with said projection. and means for securing said locking member to said guard member.

2. In a device of the class described, in

lll() combination, a frame, a flexible member connected thereto, a pendulum supported by said flexible member, a guard member for preventingr excessive displacement of said pendulum, a lockingl member engageable with said pendulum, and means for fastening said locking member to said guard member for firmly holding;l said pendulum against movement.

3. In a device of the class described, in combination, a frame, a flexible member connected thereto, a pendulum supported by said flexible member, al projection on said pendulum, a. guard member lying adjacent said projection and adapted to engage said projection to prevent excessive displacement of said pendulum, a. locking member engageable with said projection, and means or fastening; said' lockingy member to said guard member.

4. In a device ol the class described, in combination, a frame, a tlexible member connected thereto, a pendulum supported by said flexible member, a projection on said pendulum, a guard member lying adjacent said projection and' adapted to engage therewith to prevent excessive displacement ot said pendulum, a locking member having a notch adapted to engage said projection, and means for adjustably securing' said lockiircT member to said guard member whereby said` pendulum 'is lirmly locked against movement.v

5. In a device of the class described, in combination, a frame, a flexible member connected thereto, a pendulum supported by said flexible member, a projection on said pendulum, a guard member lying adjacent said projection and adapted to engage therewith to prevent excessive displacement of said pendulum, a locking member having a notch adapted to engage said projection, means tor holdinpI said projection in said notch, and means for adjustably securing said locking member to said guard member whereby 'said pendulum is firmly locked against movement.

(i. In a device otf the class described, in combination, a frame, a pair ot flexible members connected thereto, a pair ot' pendulums supported by said flexible members, each ol said pendulums having,r a projection, guard members interposed adjacent said projections and adapted to engage therewith to prevent excessive displacement ot said pendulums, a lockingr bar adapted to engage said projections, and means for secu rin;r said bar to said guard members.

7. In a device ol? the class described, in combination, a trame, a pair of flexible members connected thereto, a pair ol j )endulunis supported by said tlexible members, each of said pendulums havingr a projection, guard members interposed adjacent said projec tions and adapted to engage therewith to prevent excessive displacement ot' said pendulums, a lockingr bar having" notches adapted to engage said projections. and means for adjusiably securingr said locking bar to said pendulums.

CLARENCE II. HAPGOD.

l itnesses FRANCES DOYLE, II. O. EnNsBnRenn. 

